code: def test_warmup_length_and_zero_debias(self):
      with self.assertRaises(ValueError):
          moving_averages.ExponentialMovingAverage(
              0.5, warmup_length=2, zero_debias=True
          )
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import basic
  from haiku._src import moving_averages
  from haiku._src import multi_transform
  from haiku._src import test_utils
  from haiku._src import transform
  import jax
  import jax.numpy
  import jax.random
  import numpy
  import tree
label_desc: Use image node_id 4 for calling the MovingAveragesTest obj's underlying member method code with example usage: obj.test_warmup_length_and_zero_debias() without return types